vc中怎么插进删除代码？

void CUserDlg::OnDel()
{
// TODO: Add your control notification handler code here
}
在这样的一个类中加入删除键的代码
// UserDlg.cpp : implementation file
//#include "stdafx.h"
#include "gradudemis.h"
#include "UserDlg.h"#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif/////////////////////////////////////////////////////////////////////////////
// CUserDlg dialog
char Label; //保存用户选择的操作CUserDlg::CUserDlg(CWnd* pParent /*=NULL*/)
: CDialog(CUserDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CUserDlg)
m_strPass = _T("");
m_strRePass = _T("");
m_user = _T("");
m_IsAdmin = FALSE;
//}}AFX_DATA_INIT
}
void CUserDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CUserDlg)
DDX_Control(pDX, IDC_USER1, m_ctrlUser);
DDX_Control(pDX, IDC_Passwd, m_ctrlPass);
DDX_Control(pDX, IDC_User_LIST, m_ctrlUserList);
DDX_Text(pDX, IDC_Passwd, m_strPass);
DDX_Text(pDX, IDC_RePass, m_strRePass);
DDX_Text(pDX, IDC_USER1, m_user);
DDX_Check(pDX, IDC_IsAdmin_CHECK, m_IsAdmin);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CUserDlg, CDialog)
//{{AFX_MSG_MAP(CUserDlg)
ON_BN_CLICKED(IDC_Exit_BTN, OnExitBTN)
ON_BN_CLICKED(IDC_EDIT, OnEdit)
ON_BN_CLICKED(IDC_DEL, OnDel)
ON_BN_CLICKED(IDC_ADD, OnAdd)
ON_BN_CLICKED(IDC_Cancel_BTN, OnCancelBTN)
ON_BN_CLICKED(IDC_IsAdmin_CHECK, OnIsAdminCHECK)
ON_BN_CLICKED(IDC_Save_BTN, OnSaveBTN)
ON_LBN_SELCHANGE(IDC_User_LIST, OnSelchangeUserLIST)
ON_WM_DESTROY()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// CUserDlg message handlersBOOL CUserDlg::OnInitDialog()
{
CDialog::OnInitDialog();

// TODO: Add extra initialization here
//  m_ctrlUser.EnableWindow(false);

if(!passwdSet.IsOpen()) //打开记录集
passwdSet.Open();
   passwdSet.MoveFirst(); //移动到第一条记录
while(!passwdSet.IsEOF()) //遍历记录集
{
int nIndex=m_ctrlUserList.AddString(passwdSet.m_lgn_user); //将用户名添加到列表中
UserInfo structSet; //定义用户信息结构变量
structSet.user=passwdSet.m_lgn_user; //变量的初始化
structSet.passwd=passwdSet.m_lgn_passwd;
structSet.repasswd=passwdSet.m_lgn_passwd;
        structSet.bIsAdmin=passwdSet.m_lgn_isAdmin;
//structSet.user=deleteSet.m_lgn_delete;
m_ctrlUserList.SetItemDataPtr(nIndex,new UserInfo(structSet));//设置一个指针添加用户信息
passwdSet.MoveNext(); //移动到下条记录
}
return TRUE;  // return TRUE unless you set the focus to a control
              // EXCEPTION: OCX Property Pages should return FALSE
}void CUserDlg::OnExitBTN()
{
// TODO: Add your control notification handler code here
OnCancel(); //退出
}void CUserDlg::OnSelchangeUserLIST()
{
// TODO: Add your control notification handler code here int nIndex=m_ctrlUserList.GetCurSel(); //获取选择的索引号
if(nIndex!=LB_ERR) //如果没有抛出异常
{
UserInfo *structSet=(UserInfo *)m_ctrlUserList.GetItemDataPtr(nIndex);//取出用户信息
m_user=structSet->user; //用户信息变量的赋值
m_strPass=structSet->passwd;
m_strRePass=structSet->repasswd;
        m_IsAdmin=structSet->bIsAdmin;
UpdateData(false); //更新数据
}
}void CUserDlg::OnAdd()
{
// TODO: Add your control notification handler code here
   m_user=""; //清空编辑框
   m_strPass="";
   m_strRePass="";
   m_IsAdmin=false; //设置不为管理员
// m_ctrlUser.EnableWindow(true);
   m_ctrlUser.SetFocus(); //设置焦点
   UpdateData(false); //更新数据
   Label='A'; //保存用户所选的操作
}void CUserDlg::OnEdit()
{
// TODO: Add your control notification handler code here
// UpdateData(false);
Label='E'; //保存用户所选的操作
}void CUserDlg::OnDel()
{
// TODO: Add your control notification handler code here
//CString strSPBH;
//this->m_user=structSet(m_user);
}void CUserDlg::OnSaveBTN() //保存按钮
{
// TODO: Add your control notification handler code here
UpdateData(); //更新数据 if(m_user.IsEmpty()) //判断是否为空
{
MessageBox("姓名不能为空"); //给出提示
m_ctrlUser.SetFocus(); //设置焦点
return; //返回
}
if(m_strPass=="") //判断是否为空
{
     MessageBox("密码不能为空，请输入密码！"); //给出提示
m_ctrlPass.SetFocus(); //设置焦点
return; //返回
} switch (Label) //用户所选的操作
{
case 'A':
{ //添加新用户
m_user.TrimLeft(); //去除左边的空格
m_user.TrimRight(); //去除右边的空格
if((m_ctrlUserList.FindString(-1,m_user))!=LB_ERR) //判断是否已经添加
{
MessageBox("列表框中已有相同的姓名，不能添加"); //给出提示
m_user.Empty(); //清空编辑框
                m_strPass.Empty();
                m_strRePass.Empty();
UpdateData(false); //更新数据
                m_ctrlUser.SetFocus(); //设置焦点
return;
} int nIndex=m_ctrlUserList.AddString(m_user); //没有添加则添加
UserInfo structSet; //定义用户信息结构
structSet.user=m_user; //结构体赋值
structSet.passwd=m_strPass;
structSet.repasswd=m_strRePass;
structSet.bIsAdmin=m_IsAdmin;
//structSet.user=m_delete;
m_ctrlUserList.SetItemDataPtr(nIndex,new UserInfo(structSet));//设置指针
            //写入数据库
if(!passwdSet.IsOpen())
passwdSet.Open(); //打开记录集
      passwdSet.MoveFirst(); //移动到第一条记录
  passwdSet.AddNew(); //添加新记录
  passwdSet.m_lgn_user=structSet.user; //表中个字段的赋值
  passwdSet.m_lgn_passwd=structSet.passwd;
  passwdSet.m_lgn_isAdmin=structSet.bIsAdmin;
  passwdSet.Update(); //更新记录
  passwdSet.Requery(); //刷新记录集
  passwdSet.Close(); //关闭记录集
              MessageBox("用户添加成功，请记住用户名和密码！"); //给出提示
}
break;
case 'E':
{//修改用户
if(m_strPass!=m_strRePass) //判断用户两次密码是否一致
{
MessageBox("两次输入的密码不一致，请重新输入密码！");//给出提示
m_ctrlPass.SetFocus(); //设置焦点
m_strPass=""; //清空编辑框
m_strRePass="";
UpdateData(false); //更新数据
return;
}
CString strSQL; //定义字符串变量
strSQL.Format("select * from tab_password where lgn_user='%s'",m_user);
//构造查询查询此用户信息的sql语句
MessageBox(m_user);MessageBox("DDDDD");
if(!passwdSet.Open(AFX_DB_USE_DEFAULT_TYPE,strSQL))///////???????????????
{
MessageBox("打开数据库失败！");
return;
}
passwdSet.Edit(); //编辑记录
passwdSet.m_lgn_user=m_user; //表中字段的赋值
passwdSet.m_lgn_passwd=m_strPass;
passwdSet.m_lgn_isAdmin=m_IsAdmin;
passwdSet.Update(); //更新记录集
MessageBox("用户修改成功，请记住用户名和密码！"); //给出提示
}
break;
      default:break;
}
}void CUserDlg::OnCancelBTN()
{
// TODO: Add your control notification handler code here

}void CUserDlg::OnIsAdminCHECK()
{
// TODO: Add your control notification handler code here

}void CUserDlg::OnDestroy()
{
CDialog::OnDestroy(); //销毁对话框

// TODO: Add your message handler code here
}
这是具体的代码。帮我加上删除键的代码就是了

调试易

vc中怎么插进删除代码？

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